Weather Records on 31 July 2009

1,156 weather records were set or tied worldwide on 31 July 2009. Highest significance: Linguere, SN.

Key Facts for 31 July 2009

On 31 July 2009, 1,156 weather records were set or tied at long-record stations worldwide.
628 were record highs and 331 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 42 monthly and 1,109 daily.
Linguere set a daily record precipitation of 141.0 mm (5.6 in) on 31 July 2009.
Across 155 earlier years (1804 to 2026) the same calendar date averaged 467 records.

Record Map

1,156 stations

1,156 station records on 31 July 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 July 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Linguere	Senegal	Record daily precipitation	141.0 mm (5.6 in)	62 of 100 (Major)
Rocksprings	United States	Record daily precipitation	32.5 mm (1.3 in)	54 of 100 (Notable)
Albany Intl AP	United States	Record daily precipitation	61.5 mm (2.4 in)	53 of 100 (Notable)
Lodi	United States	Record low minimum temperature	5.0 C (41.0 F)	51 of 100 (Notable)
Ochoa	United States	Record daily precipitation	88.9 mm (3.5 in)	50 of 100 (Notable)
Tepelmeme de Morelos	Mexico	Record high maximum temperature	34.4 C (93.9 F)	48 of 100 (Notable)
Dell City 5SSW	United States	Record daily precipitation	43.2 mm (1.7 in)	46 of 100 (Notable)
Wonthaggi	Australia	Record daily precipitation	25.1 mm (1.0 in)	45 of 100 (Notable)
Madras/Minambakkam	India	Record daily precipitation	34.0 mm (1.3 in)	45 of 100 (Notable)
Hardy	United States	Record low maximum temperature	25.0 C (77.0 F)	45 of 100 (Notable)
Malvern	United States	Record low maximum temperature	24.4 C (75.9 F)	45 of 100 (Notable)
Mtn Home 1 NNW	United States	Record daily precipitation	67.8 mm (2.7 in)	45 of 100 (Notable)
Waterdale	United States	Record low minimum temperature	5.6 C (42.1 F)	45 of 100 (Notable)
Seymour 1 WSW	United States	Record daily precipitation	74.9 mm (2.9 in)	44 of 100 (Notable)
Canton 4N	United States	Record daily precipitation	63.0 mm (2.5 in)	44 of 100 (Notable)
Flatonia 4SE	United States	Record high minimum temperature	27.2 C (81.0 F)	43 of 100 (Notable)
Sanya	China	Record low maximum temperature	25.1 C (77.2 F)	42 of 100 (Notable)
Canton	Mexico	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
San Francisco	Mexico	Record high maximum temperature	42.8 C (109.0 F)	42 of 100 (Notable)
Alicia 2 NNE	United States	Record daily precipitation	30.2 mm (1.2 in)	42 of 100 (Notable)
Arkadelphia 2 N	United States	Record low maximum temperature	26.1 C (79.0 F)	42 of 100 (Notable)
Monte Vista 2W	United States	Record low minimum temperature	4.4 C (39.9 F)	42 of 100 (Notable)
Wister 3S	United States	Record daily precipitation	53.3 mm (2.1 in)	42 of 100 (Notable)
Cheyenne Wells 2NE	United States	Record daily precipitation	31.8 mm (1.3 in)	41 of 100 (Notable)
Winfield 3NE	United States	Record low maximum temperature	25.6 C (78.1 F)	41 of 100 (Notable)
Cooperstown	United States	Record low maximum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Sam Rayburn Dam	United States	Record daily precipitation	81.3 mm (3.2 in)	41 of 100 (Notable)
Colville	United States	Record high minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Sedro-Woolley	United States	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Newport	United States	Record low maximum temperature	23.9 C (75.0 F)	40 of 100 (Notable)
Seward	United States	Record low minimum temperature	9.4 C (48.9 F)	40 of 100 (Notable)
Kewaunee	United States	Record low maximum temperature	18.3 C (64.9 F)	40 of 100 (Notable)
Spokane Intl AP	United States	Record high minimum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Montemorelos	Mexico	Record high minimum temperature	25.0 C (77.0 F)	39 of 100 (Notable)
Jal	United States	Record daily precipitation	45.7 mm (1.8 in)	39 of 100 (Notable)
Hebbronville	United States	Record high minimum temperature	26.7 C (80.1 F)	39 of 100 (Notable)
San Felipe	Mexico	Record low maximum temperature	25.6 C (78.1 F)	38 of 100 (Notable)
San Miguel Ejutla	Mexico	Record high minimum temperature	18.9 C (66.0 F)	38 of 100 (Notable)
Tantoyuca	Mexico	Record high minimum temperature	25.0 C (77.0 F)	38 of 100 (Notable)
Augusta	United States	Record daily precipitation	52.8 mm (2.1 in)	38 of 100 (Notable)
Subiaco	United States	Record low maximum temperature	24.4 C (75.9 F)	38 of 100 (Notable)
Gilroy	United States	Record low minimum temperature	6.1 C (43.0 F)	38 of 100 (Notable)
Burr Oak 4S	United States	Record low minimum temperature	8.9 C (48.0 F)	38 of 100 (Notable)
Red Cloud	United States	Record low minimum temperature	8.3 C (46.9 F)	38 of 100 (Notable)
Kenton	United States	Record daily precipitation	44.2 mm (1.7 in)	38 of 100 (Notable)
Saltville 1N	United States	Record daily precipitation	43.7 mm (1.7 in)	38 of 100 (Notable)
Pecs Pogany	Hungary	Record high minimum temperature	22.4 C (72.3 F)	37 of 100 (Notable)
Contla	Mexico	Record daily precipitation	63.8 mm (2.5 in)	37 of 100 (Notable)
Wynne	United States	Record daily precipitation	26.9 mm (1.1 in)	37 of 100 (Notable)
Carthage	United States	Record daily precipitation	58.4 mm (2.3 in)	37 of 100 (Notable)
Fessenden	United States	Record low maximum temperature	17.8 C (64.0 F)	37 of 100 (Notable)
Octoraro Lake	United States	Record daily precipitation	58.2 mm (2.3 in)	37 of 100 (Notable)
Odessa	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Pittsfield Muni AP	United States	Record daily precipitation	33.3 mm (1.3 in)	37 of 100 (Notable)
San Diego de Alejandria	Mexico	Record high minimum temperature	20.0 C (68.0 F)	36 of 100 (Notable)
San Rafael	Mexico	Record high maximum temperature	26.7 C (80.1 F)	36 of 100 (Notable)
Eindhoven	Netherlands	Record low minimum temperature	0.0 C (32.0 F)	36 of 100 (Notable)
Las Palmas de Gran Canaria/Gan	Spain	Record high minimum temperature	25.7 C (78.3 F)	36 of 100 (Notable)
Calico Rock 2 WSW	United States	Record low maximum temperature	23.9 C (75.0 F)	36 of 100 (Notable)
El Dorado	United States	Record low maximum temperature	25.6 C (78.1 F)	36 of 100 (Notable)

Counts by Type and Timescale

1,156 records

Records set or tied on 31 July 2009 by type: Highest daily maximum 300, Lowest daily maximum 190, Highest daily minimum 328, Lowest daily minimum 141, Heaviest daily rainfall 197.

Records on 31 July 2009 by type
Record type	Records
Highest daily maximum	300
Lowest daily maximum	190
Highest daily minimum	328
Lowest daily minimum	141
Heaviest daily rainfall	197
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 July 2009 by timescale: all-time 5, monthly 42, daily 1,109.

How Much Records Were Beaten By

743 broken records

Margins by which the 743 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 119.0. Ties are not counted.

Top 20 by Significance

31 July 2009

Top 20 records on 31 July 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 2009	Linguere, SN	daily rain	141.0 mm (5.6 in)	119.0 mm (4.7 in)	51 years	62 of 100 (Major)
31 July 2009	Rocksprings, US	daily rain	32.5 mm (1.3 in)	22.3 mm (0.9 in)	114 years	54 of 100 (Notable)
31 July 2009	Albany Intl AP, US	daily rain	61.5 mm (2.4 in)	28.7 mm (1.1 in)	70 years	53 of 100 (Notable)
31 July 2009	Lodi, US	daily low min	5.0 C (41.0 F)	3.3 C (5.9 F)	104 years	51 of 100 (Notable)
31 July 2009	Ochoa, US	daily rain	88.9 mm (3.5 in)	50.8 mm (2.0 in)	34 years	50 of 100 (Notable)
31 July 2009	Tepelmeme de Morelos, MX	daily high max	34.4 C (93.9 F)	7.2 C (13.0 F)	48 years	48 of 100 (Notable)
31 July 2009	Dell City 5SSW, US	daily rain	43.2 mm (1.7 in)	30.0 mm (1.2 in)	27 years	46 of 100 (Notable)
31 July 2009	Wonthaggi, AU	daily rain	25.1 mm (1.0 in)	6.6 mm (0.26 in)	92 years	45 of 100 (Notable)
31 July 2009	Madras/Minambakkam, IN	daily rain	34.0 mm (1.3 in)	10.6 mm (0.4 in)	92 years	45 of 100 (Notable)
31 July 2009	Hardy, US	daily low max	25.0 C (77.0 F)	1.7 C (3.1 F)	110 years	45 of 100 (Notable)
31 July 2009	Malvern, US	daily low max	24.4 C (75.9 F)	1.7 C (3.1 F)	107 years	45 of 100 (Notable)
31 July 2009	Mtn Home 1 NNW, US	daily rain	67.8 mm (2.7 in)	47.2 mm (1.9 in)	20 years	45 of 100 (Notable)
31 July 2009	Waterdale, US	daily low min	5.6 C (42.1 F)	1.6 C (2.9 F)	106 years	45 of 100 (Notable)
31 July 2009	Seymour 1 WSW, US	daily rain	74.9 mm (2.9 in)	39.3 mm (1.5 in)	16 years	44 of 100 (Notable)
31 July 2009	Canton 4N, US	daily rain	63.0 mm (2.5 in)	28.7 mm (1.1 in)	51 years	44 of 100 (Notable)
31 July 2009	Flatonia 4SE, US	daily high min	27.2 C (81.0 F)	1.1 C (2.0 F)	84 years	43 of 100 (Notable)
31 July 2009	Sanya, CN	daily low max	25.1 C (77.2 F)	3.9 C (7.0 F)	32 years	42 of 100 (Notable)
31 July 2009	Canton, MX	daily high min	25.0 C (77.0 F)	2.2 C (4.0 F)	56 years	42 of 100 (Notable)
31 July 2009	San Francisco, MX	daily high max	42.8 C (109.0 F)	7.8 C (14.0 F)	47 years	42 of 100 (Notable)
31 July 2009	Alicia 2 NNE, US	daily rain	30.2 mm (1.2 in)	3.5 mm (0.14 in)	100 years	42 of 100 (Notable)

Significance is a score from 0 to 100 combining margin, the age of the old record and the length of the station's record. How it is computed.

The Same Date in Other Years

1804 to 2009

Records set or tied on this calendar date in each year from 1804 to 2009. 2009 had 1,156 records.

Counts for years before the ledger starts come from the same station rules.

Records on 07-31 in each year
Year	Records
1804	1
1815	1
1816	1
1828	1
1834	1
1839	1
1840	1
1841	2
1851	1
1858	2
1860	4
1863	1
1866	1
1873	2
1876	1
1879	1
1884	1
1885	1
1886	1
1887	5
1889	2
1890	2
1891	1
1892	1
1893	3
1894	2
1896	2
1897	2
1898	5
1900	1
1901	3
1902	4
1903	16
1904	12
1905	10
1906	14
1907	17
1908	22
1909	15
1910	21
1911	29
1912	14
1913	31
1914	28
1915	71
1916	63
1917	126
1918	39
1919	27
1920	168
1921	112
1922	24
1923	236
1924	97
1925	349
1926	226
1927	161
1928	145
1929	134
1930	143
1931	441
1932	314
1933	504
1934	449
1935	418
1936	548
1937	297
1938	417
1939	357
1940	415
1941	323
1942	342
1943	342
1944	312
1945	499
1946	426
1947	341
1948	341
1949	406
1950	511
1951	364
1952	472
1953	414
1954	459
1955	813
1956	574
1957	268
1958	374
1959	424
1960	622
1961	504
1962	348
1963	294
1964	637
1965	858
1966	606
1967	326
1968	637
1969	440
1970	576
1971	1,850
1972	667
1973	583
1974	363
1975	1,386
1976	530
1977	543
1978	754
1979	501
1980	1,047
1981	672
1982	767
1983	901
1984	777
1985	1,065
1986	1,021
1987	934
1988	940
1989	1,753
1990	911
1991	647
1992	1,169
1993	1,031
1994	1,207
1995	1,223
1996	1,084
1997	984
1998	1,195
1999	1,643
2000	1,001
2001	1,414
2002	1,080
2003	1,157
2004	779
2005	742
2006	1,405
2007	1,023
2008	911
2009	1,156
2010	1,485
2011	1,040
2012	712
2013	469
2014	1,000
2015	948
2016	501
2017	485
2018	1,135
2019	551
2020	1,034
2021	1,020
2022	861
2023	671
2024	748
2025	836
2026	754

Download the Data

Data for records on 2009-07-31: CSV or JSON. Field meanings are on the data page.

Sources: Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	704
20 to 40	31
40 to 60	7
60 to 80	0
80 to 100	0
100 to 120	1